AR047997A1 - A PILOT TRANSMISSION METHOD AND DEVICE AND CHANNEL ESTIMATION FOR MISO AND MIMO RECEIVERS IN A MULTIPLE ANTENNA SYSTEM - Google Patents

A PILOT TRANSMISSION METHOD AND DEVICE AND CHANNEL ESTIMATION FOR MISO AND MIMO RECEIVERS IN A MULTIPLE ANTENNA SYSTEM

Info

Publication number
AR047997A1
AR047997A1 ARP050100871A ARP050100871A AR047997A1 AR 047997 A1 AR047997 A1 AR 047997A1 AR P050100871 A ARP050100871 A AR P050100871A AR P050100871 A ARP050100871 A AR P050100871A AR 047997 A1 AR047997 A1 AR 047997A1
Authority
AR
Argentina
Prior art keywords
composite
miso
derives
performance
pilots
Prior art date
Application number
ARP050100871A
Other languages
Spanish (es)
Inventor
Dhananjay A Gore
Tamer Kadous
Avneesh Agrawal
Original Assignee
Qualcomm Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Publication of AR047997A1 publication Critical patent/AR047997A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0684—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission using different training sequences per antenna
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2621—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using frequency division multiple access [FDMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0226—Channel estimation using sounding signals sounding signals per se

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Radio Transmission System (AREA)

Abstract

Un transmisor genera multiples pilotos compuestos con una matriz de instruccion y una matriz de rendimiento, y escalada con multiples elementos de rendimiento en una columna de matriz de rendimiento. El transmisor transmite cada piloto compuesto a través de multiples antenas de transmision. Un receptor MISO obtiene símbolos recibidos para los multiples pilotos compuestos y deriva una estimacion de un canal MISO compuesto. Para OFDM, el receptor MISO deriva una estimacion de respuesta de impulso inicial para cada piloto compuesto, filtra las estimaciones de respuesta de impulso inicial para todos los pilotos compuestos y deriva una estimacion de respuesta de frecuencia para el canal compuesto MISO. Un receptor MIMO obtiene y procesa los símbolos recibidos para los multiples pilotos compuestos en base a las matrices de instruccion y de rendimiento y deriva las estimaciones de canal a canales de SISO individuales entre las multiples antenas de transmision y las multiples antenas de recepcion.A transmitter generates multiple composite pilots with an instruction matrix and a performance matrix, and scaling with multiple performance elements in a performance matrix column. The transmitter transmits each composite pilot through multiple transmission antennas. A MISO receiver obtains symbols received for multiple composite pilots and derives an estimate from a composite MISO channel. For OFDM, the MISO receiver derives an initial impulse response estimate for each composite pilot, filters the initial impulse response estimates for all composite pilots, and derives a frequency response estimate for the MISO composite channel. A MIMO receiver obtains and processes the symbols received for the multiple composite pilots based on the instruction and performance matrices and derives the channel estimates to individual SISO channels between the multiple transmission antennas and the multiple reception antennas.

ARP050100871A 2004-03-05 2005-03-07 A PILOT TRANSMISSION METHOD AND DEVICE AND CHANNEL ESTIMATION FOR MISO AND MIMO RECEIVERS IN A MULTIPLE ANTENNA SYSTEM AR047997A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US55089304P 2004-03-05 2004-03-05
US11/020,888 US8077691B2 (en) 2004-03-05 2004-12-22 Pilot transmission and channel estimation for MISO and MIMO receivers in a multi-antenna system

Publications (1)

Publication Number Publication Date
AR047997A1 true AR047997A1 (en) 2006-03-15

Family

ID=34914695

Family Applications (1)

Application Number Title Priority Date Filing Date
ARP050100871A AR047997A1 (en) 2004-03-05 2005-03-07 A PILOT TRANSMISSION METHOD AND DEVICE AND CHANNEL ESTIMATION FOR MISO AND MIMO RECEIVERS IN A MULTIPLE ANTENNA SYSTEM

Country Status (15)

Country Link
US (1) US8077691B2 (en)
EP (1) EP1726136A1 (en)
JP (1) JP4505499B2 (en)
KR (2) KR20060127249A (en)
CN (1) CN1951077B (en)
AR (1) AR047997A1 (en)
AU (1) AU2005226570A1 (en)
BR (1) BRPI0508413A (en)
CA (1) CA2558557C (en)
IL (1) IL177882A0 (en)
MX (1) MXPA06010068A (en)
RU (2) RU2347315C2 (en)
SG (1) SG153799A1 (en)
TW (1) TWI404355B (en)
WO (1) WO2005094023A1 (en)

Families Citing this family (100)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4130191B2 (en) * 2004-01-28 2008-08-06 三洋電機株式会社 Transmitter
US7742533B2 (en) 2004-03-12 2010-06-22 Kabushiki Kaisha Toshiba OFDM signal transmission method and apparatus
KR100670417B1 (en) * 2004-04-28 2007-01-16 삼성전자주식회사 Method and apparatus for generating of the preamble sequence for an adaptive antenna system in an orthogonal frequency division multiple access communication system
US7418046B2 (en) * 2004-07-22 2008-08-26 Qualcomm Inc. Pilot transmission and channel estimation for multiple transmitters
US20070081484A1 (en) * 2004-07-29 2007-04-12 Wang Michael M Methods and apparatus for transmitting a frame structure in a wireless communication system
US9246728B2 (en) 2004-07-29 2016-01-26 Qualcomm Incorporated System and method for frequency diversity
US20080317142A1 (en) * 2005-07-29 2008-12-25 Qualcomm Incorporated System and method for frequency diversity
US8391410B2 (en) * 2004-07-29 2013-03-05 Qualcomm Incorporated Methods and apparatus for configuring a pilot symbol in a wireless communication system
SG155170A1 (en) * 2004-07-29 2009-09-30 Qualcomm Inc System and method for diversity interleaving
US7327803B2 (en) 2004-10-22 2008-02-05 Parkervision, Inc. Systems and methods for vector power amplification
WO2006071056A1 (en) * 2004-12-27 2006-07-06 Samsung Electronics Co., Ltd. Method and apparatus for transmitting/receiving a signal in an ffh-ofdm communication system
US8428001B2 (en) 2005-03-10 2013-04-23 Qualcomm Incorporated Timing corrections in a multi carrier system and propagation to a channel estimation time filter
US7715460B2 (en) * 2005-04-22 2010-05-11 Interdigital Technology Corporation Hybrid orthogonal frequency division multiple access system and method
US20060245509A1 (en) * 2005-04-27 2006-11-02 Samsung Electronics Co., Ltd Method and system for processing MIMO pilot signals in an orthogonal frequency division multiplexing network
US8059608B2 (en) * 2005-06-14 2011-11-15 Qualcomm Incorporated Transmit spatial diversity for cellular single frequency networks
US7738356B2 (en) * 2005-06-28 2010-06-15 Broadcom Corporation Multiple stream cyclic-shifted delay transmitter
US9042212B2 (en) 2005-07-29 2015-05-26 Qualcomm Incorporated Method and apparatus for communicating network identifiers in a communication system
US9391751B2 (en) * 2005-07-29 2016-07-12 Qualcomm Incorporated System and method for frequency diversity
US8139672B2 (en) * 2005-09-23 2012-03-20 Qualcomm Incorporated Method and apparatus for pilot communication in a multi-antenna wireless communication system
KR100831177B1 (en) * 2005-10-08 2008-05-21 삼성전자주식회사 Apparatus and method for transmitting in smart antenna communication systems
US7911272B2 (en) 2007-06-19 2011-03-22 Parkervision, Inc. Systems and methods of RF power transmission, modulation, and amplification, including blended control embodiments
BRPI0708089A2 (en) * 2006-02-21 2011-05-17 Qualcomm Inc pilot space structure for multi-antenna wireless communication
US8077595B2 (en) * 2006-02-21 2011-12-13 Qualcomm Incorporated Flexible time-frequency multiplexing structure for wireless communication
US8689025B2 (en) * 2006-02-21 2014-04-01 Qualcomm Incorporated Reduced terminal power consumption via use of active hold state
US9461736B2 (en) * 2006-02-21 2016-10-04 Qualcomm Incorporated Method and apparatus for sub-slot packets in wireless communication
US8165018B2 (en) * 2006-03-17 2012-04-24 Rockstar Bidco, LP Closed-loop MIMO systems and methods
WO2007119207A2 (en) * 2006-04-13 2007-10-25 Nxp B.V. Channel estimation using common and dedicated pilots
US8446998B2 (en) * 2006-05-04 2013-05-21 Quantenna Communications, Inc. Multiple antenna receiver system and method
US8738056B2 (en) 2006-05-22 2014-05-27 Qualcomm Incorporation Signal acquisition in a wireless communication system
MX2008015812A (en) * 2006-06-13 2009-01-12 Qualcomm Inc Preamble structure and acquisition for a wireless communication system.
US8676209B2 (en) 2006-06-13 2014-03-18 Qualcomm Incorporated Handoff selection for wireless communication systems
US8929353B2 (en) 2007-05-09 2015-01-06 Qualcomm Incorporated Preamble structure and acquisition for a wireless communication system
US10084627B2 (en) * 2006-07-10 2018-09-25 Qualcomm Incorporated Frequency hopping in an SC-FDMA environment
US8693525B2 (en) * 2006-07-14 2014-04-08 Qualcomm Incorporated Multi-carrier transmitter for wireless communication
WO2008041546A1 (en) * 2006-09-25 2008-04-10 Panasonic Corporation Radio communication device and pilot arrangement method
US8619746B2 (en) * 2006-10-10 2013-12-31 Qualcomm Incorporated Channel estimation for multi-carrier communication
JP5159274B2 (en) 2006-11-30 2013-03-06 パナソニック株式会社 Wireless transmission apparatus and wireless transmission method
WO2008069105A1 (en) * 2006-11-30 2008-06-12 Panasonic Corporation Radio transmission device, radio reception device, radio transmission method, and radio reception method
WO2008103317A2 (en) 2007-02-16 2008-08-28 Interdigital Technology Corporation Precoded pilot transmission for multi-user and single user mimo communications
US20080219332A1 (en) * 2007-03-05 2008-09-11 Qualcomm Incorporated Apparatus and methods accounting for automatic gain control in a multi carrier system
US8098567B2 (en) * 2007-03-05 2012-01-17 Qualcomm Incorporated Timing adjustments for channel estimation in a multi carrier system
US8750248B2 (en) * 2007-03-21 2014-06-10 Qualcomm Incorporated Methods and apparatus for RF handoff in a multi-frequency network
US8737353B2 (en) * 2007-03-21 2014-05-27 Qualcomm Incorporated Methods and apparatus for RF handoff in a multi-frequency network
KR101496382B1 (en) * 2007-03-21 2015-02-27 인터디지탈 테크날러지 코포레이션 Mimo wireless communication method and apparatus for transmitting and decoding resource block structures based on a dedicated reference signal mode
US8948757B2 (en) * 2007-03-21 2015-02-03 Qualcomm Incorporated Methods and apparatus for RF handoff in a multi-frequency network
US8737350B2 (en) * 2007-03-21 2014-05-27 Qualcomm Incorporated Methods and apparatus for RF handoff in a multi-frequency network
US8457064B2 (en) * 2007-03-21 2013-06-04 Qualcomm Incorporated Methods and apparatus for RF handoff in a multi-frequency network
US8565799B2 (en) * 2007-04-04 2013-10-22 Qualcomm Incorporated Methods and apparatus for flow data acquisition in a multi-frequency network
RU2475987C2 (en) * 2007-04-24 2013-02-20 Конинклейке Филипс Электроникс Н.В. Single-frequency network
US8811352B2 (en) * 2007-06-04 2014-08-19 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for channel estimation in a transmit diversity environment
GB2447997A (en) * 2007-06-04 2008-10-01 British Broadcasting Corp Multiplexing a MIMO signal and a non-MIMO (e.g. MISO) signal into an OFDM signal
US8411805B1 (en) 2007-08-14 2013-04-02 Marvell International Ltd. Joint estimation of channel and preamble sequence for orthogonal frequency division multiplexing systems
KR100930717B1 (en) * 2007-09-13 2009-12-09 한국전자통신연구원 Channel Estimation and Feedback Method in Wireless Communication System
JP2011501536A (en) * 2007-10-12 2011-01-06 ビーシーム・コミュニケーションズ、インコーポレーテッド Receiver method to evaluate multiple channel cross-references to related applications
US8570939B2 (en) * 2008-03-07 2013-10-29 Qualcomm Incorporated Methods and systems for choosing cyclic delays in multiple antenna OFDM systems
KR100955696B1 (en) * 2008-05-07 2010-05-03 재단법인서울대학교산학협력재단 Apparatus and method for estimation of channel information using frequency domain and space domain orthogonal transformation in wireless communication systems
EP2129035B1 (en) * 2008-05-29 2013-11-06 Sony Corporation Improved pilot allocation in multi-carrier systems with frequency notching
US20110129027A1 (en) * 2008-07-29 2011-06-02 Panasonic Corporation Wireless communication base station device, wireless communication terminal device, and method for setting cyclic delay
US7970359B2 (en) * 2008-07-29 2011-06-28 Alvarion Ltd. Delay diversity in antenna arrays
US8340605B2 (en) * 2008-08-06 2012-12-25 Qualcomm Incorporated Coordinated transmissions between cells of a base station in a wireless communications system
CN102273295B (en) * 2008-11-13 2015-01-21 苹果公司 Method and system for reduced complexity channel estimation and interference cancellation for V-MIMO demodulation
US8761274B2 (en) * 2009-02-04 2014-06-24 Acorn Technologies, Inc. Least squares channel identification for OFDM systems
US8711751B2 (en) * 2009-09-25 2014-04-29 Apple Inc. Methods and apparatus for dynamic identification (ID) assignment in wireless networks
US8638682B2 (en) 2009-10-01 2014-01-28 Qualcomm Incorporated Method and apparatus for conducting measurements when multiple carriers are supported
EP2346224A1 (en) * 2010-01-13 2011-07-20 Panasonic Corporation Pilot Patterns for OFDM Systems with Four Transmit Antennas
CN101834824B (en) * 2010-03-22 2012-08-08 深圳市云海通讯股份有限公司 Multicarrier filtration method, multicarrier filtration system and repeater
CN102237945A (en) * 2010-05-06 2011-11-09 松下电器产业株式会社 Code division multiplexing method based on quadrature encoding, code division multiplexing equipment and demultiplexing equipment
US10667148B1 (en) * 2010-05-28 2020-05-26 Cohere Technologies, Inc. Methods of operating and implementing wireless communications systems
EP2715867A4 (en) * 2011-06-02 2014-12-17 Parkervision Inc Antenna control
US9078205B2 (en) * 2012-03-09 2015-07-07 Qualcomm Incorporated Methods and apparatus for enabling non-destaggered channel estimation
TWI448116B (en) * 2012-03-15 2014-08-01 Nat Univ Tsing Hua Orthogonal frequency-division multiplexing system capable of optimizing channel estimation and method for optimizing channel estimation for orthogonal frequency-division multiplexing system
KR20160058855A (en) 2013-09-17 2016-05-25 파커비전, 인크. Method, apparatus and system for rendering an information bearing function of time
EP2928139B1 (en) * 2014-03-31 2020-09-30 Mitsubishi Electric R&D Centre Europe B.V. Method and a device for cancelling a narrow band interference in a single carrier signal
JP6313095B2 (en) * 2014-04-01 2018-04-18 株式会社Ｎｔｔドコモ base station
CN107113256B (en) * 2015-02-13 2019-11-26 华为技术有限公司 A kind of channel estimation methods, apparatus and system
WO2016165099A1 (en) * 2015-04-16 2016-10-20 华为技术有限公司 Method for generating pilot frequency sequence, and channel demodulation method and device
CN105207959B (en) * 2015-04-16 2018-12-07 西安交通大学 A kind of channel estimation methods of MISO-OFDM system
CN106685520B (en) * 2015-11-06 2019-02-22 北京信威通信技术股份有限公司 Pilot signal generation method and device and CDMA uplink synchronisation method and device
CN105515692B (en) * 2016-01-08 2017-11-17 深圳市通用测试系统有限公司 A kind of wireless device test system
US10432272B1 (en) 2018-11-05 2019-10-01 XCOM Labs, Inc. Variable multiple-input multiple-output downlink user equipment
US10812216B2 (en) 2018-11-05 2020-10-20 XCOM Labs, Inc. Cooperative multiple-input multiple-output downlink scheduling
US10659112B1 (en) 2018-11-05 2020-05-19 XCOM Labs, Inc. User equipment assisted multiple-input multiple-output downlink configuration
US10756860B2 (en) 2018-11-05 2020-08-25 XCOM Labs, Inc. Distributed multiple-input multiple-output downlink configuration
EP3888256A4 (en) 2018-11-27 2022-08-31 Xcom Labs, Inc. Non-coherent cooperative multiple-input multiple-output communications
US11063645B2 (en) 2018-12-18 2021-07-13 XCOM Labs, Inc. Methods of wirelessly communicating with a group of devices
US10756795B2 (en) 2018-12-18 2020-08-25 XCOM Labs, Inc. User equipment with cellular link and peer-to-peer link
US11330649B2 (en) 2019-01-25 2022-05-10 XCOM Labs, Inc. Methods and systems of multi-link peer-to-peer communications
US10756767B1 (en) 2019-02-05 2020-08-25 XCOM Labs, Inc. User equipment for wirelessly communicating cellular signal with another user equipment
US10756782B1 (en) 2019-04-26 2020-08-25 XCOM Labs, Inc. Uplink active set management for multiple-input multiple-output communications
US11032841B2 (en) 2019-04-26 2021-06-08 XCOM Labs, Inc. Downlink active set management for multiple-input multiple-output communications
US10686502B1 (en) 2019-04-29 2020-06-16 XCOM Labs, Inc. Downlink user equipment selection
US10735057B1 (en) 2019-04-29 2020-08-04 XCOM Labs, Inc. Uplink user equipment selection
US11411778B2 (en) 2019-07-12 2022-08-09 XCOM Labs, Inc. Time-division duplex multiple input multiple output calibration
CN111901082A (en) * 2020-01-16 2020-11-06 中兴通讯股份有限公司 Signal processing method and device, first communication node and second communication node
US11411779B2 (en) 2020-03-31 2022-08-09 XCOM Labs, Inc. Reference signal channel estimation
WO2021242574A1 (en) 2020-05-26 2021-12-02 XCOM Labs, Inc. Interference-aware beamforming
US11223402B1 (en) 2020-08-07 2022-01-11 Facebook, Inc. Assisted channel approximation for wireless communication of a supercell base station
WO2022087569A1 (en) 2020-10-19 2022-04-28 XCOM Labs, Inc. Reference signal for wireless communication systems
WO2022093988A1 (en) 2020-10-30 2022-05-05 XCOM Labs, Inc. Clustering and/or rate selection in multiple-input multiple-output communication systems
CN113660023B (en) * 2021-06-08 2022-06-21 北京工商大学 System and method for user selection in multi-satellite cooperative communication based on FPGA

Family Cites Families (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR970011690B1 (en) * 1994-11-22 1997-07-14 삼성전자 주식회사 Data receiver & transmitter of spread spectrum using pilot channel
US5831977A (en) 1996-09-04 1998-11-03 Ericsson Inc. Subtractive CDMA system with simultaneous subtraction in code space and direction-of-arrival space
US6038263A (en) * 1997-07-31 2000-03-14 Motorola, Inc. Method and apparatus for transmitting signals in a communication system
CN1164046C (en) 1998-05-13 2004-08-25 三星电子株式会社 Device and method for a mobile station for receiving signals transmitted from a base station
US7068628B2 (en) * 2000-05-22 2006-06-27 At&T Corp. MIMO OFDM system
US6711412B1 (en) * 2000-10-13 2004-03-23 Iospan Wireless, Inc. Interference mitigation in wireless communications by training of interfering signals
DE10051144C2 (en) * 2000-10-16 2002-11-14 Siemens Ag Method for improving channel estimation in a radio communication system
BR0208208A (en) 2001-03-28 2006-12-12 Nokia Corp A method and apparatus for encoding phase jump and special time signals for transmission by a plurality of antennas
US20020176485A1 (en) * 2001-04-03 2002-11-28 Hudson John E. Multi-cast communication system and method of estimating channel impulse responses therein
JP3590008B2 (en) * 2001-08-15 2004-11-17 日本電信電話株式会社 OFDM signal transmitting apparatus and OFDM signal receiving apparatus
KR100510434B1 (en) 2001-04-09 2005-08-26 니폰덴신뎅와 가부시키가이샤 OFDM signal transmission system, OFDM signal transmission apparatus and OFDM signal receiver
US6751187B2 (en) 2001-05-17 2004-06-15 Qualcomm Incorporated Method and apparatus for processing data for transmission in a multi-channel communication system using selective channel transmission
US6711124B2 (en) * 2001-05-25 2004-03-23 Ericsson Inc. Time interval based channel estimation with transmit diversity
US20020193146A1 (en) * 2001-06-06 2002-12-19 Mark Wallace Method and apparatus for antenna diversity in a wireless communication system
US7154936B2 (en) * 2001-12-03 2006-12-26 Qualcomm, Incorporated Iterative detection and decoding for a MIMO-OFDM system
US6785520B2 (en) * 2002-03-01 2004-08-31 Cognio, Inc. System and method for antenna diversity using equal power joint maximal ratio combining
ATE471002T1 (en) 2002-04-25 2010-06-15 Imec CDMA RECEIVE-TRANSMISSION TECHNIQUES FOR RADIO SYSTEMS WITH MULTIPLE INPUTS AND MULTIPLE OUTPUTS (MIMO)
US8320301B2 (en) 2002-10-25 2012-11-27 Qualcomm Incorporated MIMO WLAN system
US8218609B2 (en) 2002-10-25 2012-07-10 Qualcomm Incorporated Closed-loop rate control for a multi-channel communication system
US8570988B2 (en) * 2002-10-25 2013-10-29 Qualcomm Incorporated Channel calibration for a time division duplexed communication system
US8134976B2 (en) 2002-10-25 2012-03-13 Qualcomm Incorporated Channel calibration for a time division duplexed communication system
US7151809B2 (en) 2002-10-25 2006-12-19 Qualcomm, Incorporated Channel estimation and spatial processing for TDD MIMO systems
US7986742B2 (en) 2002-10-25 2011-07-26 Qualcomm Incorporated Pilots for MIMO communication system
US7385617B2 (en) * 2003-05-07 2008-06-10 Illinois Institute Of Technology Methods for multi-user broadband wireless channel estimation
US7065144B2 (en) * 2003-08-27 2006-06-20 Qualcomm Incorporated Frequency-independent spatial processing for wideband MISO and MIMO systems

Also Published As

Publication number Publication date
CA2558557C (en) 2013-04-23
KR20060127249A (en) 2006-12-11
CN1951077A (en) 2007-04-18
IL177882A0 (en) 2006-12-31
TW200610292A (en) 2006-03-16
KR100887606B1 (en) 2009-03-11
RU2347315C2 (en) 2009-02-20
EP1726136A1 (en) 2006-11-29
TWI404355B (en) 2013-08-01
JP4505499B2 (en) 2010-07-21
US20050195763A1 (en) 2005-09-08
CN1951077B (en) 2012-08-29
AU2005226570A1 (en) 2005-10-06
CA2558557A1 (en) 2005-10-06
RU2476994C2 (en) 2013-02-27
RU2006135130A (en) 2008-04-10
KR20080054445A (en) 2008-06-17
WO2005094023A1 (en) 2005-10-06
RU2008139699A (en) 2010-04-20
JP2007527671A (en) 2007-09-27
BRPI0508413A (en) 2007-07-24
US8077691B2 (en) 2011-12-13
SG153799A1 (en) 2009-07-29
MXPA06010068A (en) 2006-12-15

Similar Documents

Publication Publication Date Title
AR047997A1 (en) A PILOT TRANSMISSION METHOD AND DEVICE AND CHANNEL ESTIMATION FOR MISO AND MIMO RECEIVERS IN A MULTIPLE ANTENNA SYSTEM
HK1126587A1 (en) Method and device for disposing pilot sequences within transmissions of a multicarrier system
ES2478519T3 (en) Adaptive pilot insertion for a MIMO-OFDM system
TW200616365A (en) Continuous beamforming for a MIMO-OFDM system
EP1623505A4 (en) Fast frequency hopping with a code division multiplexed pilot in an ofdma system
WO2010050735A3 (en) 8-transmit antenna reference signal design for downlink communications in a wireless system
AR054135A1 (en) DATA TRANSMISSION AND PILOT IN A MULTIPLE ACCESS SYSTEM BY QUASI-ORTOGONAL FREQUENCY DIVISION OF A SINGLE CARRIER
CL2004002231A1 (en) METHOD AND APPLIANCE FOR TRANSMITTING / RECEIVING PILOTS IN A WIRELESS TRANSMISSION SYSTEM USING MULTIPLAXED BY ORTOGONAL FREQUENCY DIVISION (OFDM).
TWI316339B (en) Apparatus and method for transmitting/receiving data in a mobile communication system using multiple antennas
AR044663A1 (en) METHOD AND APPLIANCE TO ESTIMATE CARRIER FREQUENCY DISPLACEMENT AND DEFROST RATE USING SELF-REGIONAL CHANNEL MODELING
AR013648A1 (en) METHOD AND APPLIANCE TO TRANSMIT SIGNALS IN A COMMUNICATIONS SYSTEM AND METHOD TO IMPLEMENT THE DIVERSITY OF TRANSMISSION IN A COMMUNICATIONS SYSTEM
EP2518930A3 (en) Multiplexing for a multi-carrier cellular communication system
RU2009133038A (en) LIMITED CHANGE OF CHANNELS IN WIRELESS COMMUNICATION SYSTEMS
WO2007052115A3 (en) Signal arrangement for multi-bandwidth ofdm system
CA2547493A1 (en) Multi-antenna system to simultaneous support of miso and mimo receivers
EP2026518A3 (en) Method and apparatus for pilot muliplexing in a wireless communication system
AR041985A1 (en) TRANSMISSION SCHEME FOR MULTI-CARRIER MULTI-CARRIER SYSTEMS - MULTIPLE OUTPUT (MIMO)
MX2010001793A (en) Apparatus and method of determining a precoding matrix in a multi- input multi-output (mimo) system.
EP1424821A3 (en) Symbol timing for MIMO OFDM and other wireless communication systems
AR072414A1 (en) METHOD AND APPARATUS FOR SIGNALING OF PRECODIFICATION VECTORS
SE0004403D0 (en) Methods and arrangements in a telecommunications system
WO2007109679A3 (en) Uplink channel estimation using a signaling channel
RU2007137543A (en) SENDING DEVICE, SIGNAL TRANSMISSION METHOD, RECEIVER AND SIGNAL RECEIVING METHOD
GB2468049A (en) Determination of pre-coding matrix indicator for spatial multiplexing in a mobile communcations system
WO2007127450A3 (en) A method of training a communication system

Legal Events

Date Code Title Description
FB Suspension of granting procedure